CN1308216C - elevator system - Google Patents

Abstract

The invention relates to a machine-roomless elevator system having a drive motor (2) with a drive pulley (16), an elevator car (3) and a counterweight (8) arranged on one side of the elevator car. The drive motor (2) drives a flat belt-like support means (12) as a ribbed belt by means of a drive wheel (16), which supports the elevator car (3) in a wrap-around manner and a counterweight on a support wheel (11) and moves it along a vertical guide rail (5). The ribbed belt has, at least on the running surface facing the drive wheel (16), a plurality of ribs and grooves running parallel in the longitudinal direction of the belt, said ribs and grooves being used to improve the traction properties of the support means.

Description

elevator system

technical field

The invention relates to an elevator system without machine room.

Background technique

The elevator system according to the invention generally has an elevator car and a counterweight which move within the elevator shaft or along exposed guides. To generate the movement, the elevator system has at least one drive with at least one driving pulley, which supports the elevator car and the counterweight via a support and drive mechanism and transmits the necessary drive force to the elevator car and the counterweight. Heavy.

The carrying or drive mechanism will be referred to below as carrying mechanism.

In typical elevator systems steel wire cables with a circular cross section are usually used as support means. However, newer elevator systems will use more flat belt-like bearing mechanisms.

In WO 99/43593, an elevator system with a flat belt-like carrier is disclosed. In the embodiment shown in FIG. 6 of this document, the elevator system has a drive motor which is arranged above the elevator car in the shaft space and which acts on the flat carrier bar via at least one drive pulley. On the belt, the elevator car is moved up/down using the carrying mechanism belt and a counterweight arranged on one side thereof. The flat belt-shaped bearing mechanism extends horizontally from one side of the driving wheel to the first reversing wheel, wraps the reversing wheel at 90°, and then extends downward along the car wall on the counterweight side, respectively at 90° Surrounding two car load wheels respectively arranged on both sides below the elevator car and extending upward along a car wall facing away from the counterweight to the first bearing mechanism fixing point set in the upper range of the car shaft . The bearing mechanism extends horizontally from the other side of the drive wheel to the second reversing wheel, wraps around the second reversing wheel at 90°, and then extends to the car side of the outer circle of the counterweight bearing wheel, wraps the counterweight at 180° The carrying wheels and the second carrying mechanism fixed point extending vertically within the range of the shaft top.

Owing to having adopted the load-carrying mechanism of flat belt, so the advantage of this elevator system is, can adopt the diameter obviously smaller than the diameter of driving pulley and reversing pulley and carrying pulley that the usual wire rope allows. Due to the small diameter of the driving wheel, the driving torque required on the driving wheel is reduced, so that a smaller driving motor can be used. Due to the smaller diameters of all the supporting means wheels, a simpler and space-saving elevator system can be realized.

But the elevator system disclosed in WO 99/43593 has certain disadvantages.

Due to the small diameter of the drive pulley and because the measure to improve traction when using a flat belt as load carrier - undercutting rope grooves on the drive pulley for a round load carrier - is not suitable, the load and empty When the weight between the loaded elevator cars is relatively large, the problem arises that the traction force transmitted between the drive pulley and the flat belt-shaped traction mechanism is insufficient.

It is also known that when using flat belt-shaped support means, the problem of lateral guidance of the support means on the drive pulley, deflection pulley and load pulley can arise without forming the running surfaces. Experience has shown that there is a risk of damage to the load-carrying mechanism due to severe friction of the load-carrying mechanism on the side flat rings that are usually present on the driving wheel, reversing wheel and load-carrying wheel.

Contents of the invention

The object of the present invention is to propose an elevator system with a flat-belt-shaped support mechanism in which the above-mentioned disadvantages are overcome.

The technical scheme that realizes described object according to the present invention is as follows:

An elevator system without a machine room, the elevator system has a driving motor with a driving wheel, an elevator car and a counterweight arranged on one side of the elevator car, wherein the driving motor supports at least one flat belt-shaped support and / or driving mechanism drives, and the carrying and/or driving mechanism carries the elevator car in a circling manner and moves the elevator car along the vertical guide rail, the flat belt-shaped carrying and/or driving mechanism is a wedge belt, At least on the sliding surface facing the drive pulley, the belt has a plurality of ribs and grooves running parallel in the longitudinal direction of the belt.

According to a further design of the present invention, the cross sections of the ribs and grooves are basically triangular or trapezoidal.

According to a further design of the present invention, the angle between the side edges of said rib or groove on at least one triangular or trapezoidal rib or groove is between 80° and 100°.

According to a further design of the present invention, the angle is 90°.

According to a refinement of the invention, the wedge-ribbed belt has transverse grooves on its side with ribs and grooves.

According to a further development of the invention, a plurality of individual wedge-ribbon belts arranged in parallel are provided as support means.

According to a further design of the present invention, the outer diameter of the driving wheel is 70mm to 100mm.

According to a further design of the present invention, one car guide rail and two counterweight guide rails are respectively arranged on the counterweight side of the elevator car on both sides of the elevator car, and the driving motor with the driving wheel shaft and the driving wheel is installed on the On the motor bracket, the motor bracket is supported by one of the car guide rails and two counterweight guide rails.

According to a further design of the present invention, a braking unit is additionally installed on the motor bracket, and the braking unit acts on the driving wheel through the driving wheel shaft.

According to a further design of the present invention, the drive motor with the driving wheel is arranged above the space required by the elevator car, wherein the plane of the driving wheel is perpendicular to the car wall on the counterweight side and at right angles to the latter, and is arranged approximately at The middle of the depth of the car, and the vertical projection of the driving wheel on the counterweight side of the elevator car is outside the vertical projection of the elevator car, but a part of the vertical projection of the drive motor overlaps with the vertical projection of the elevator car.

According to a further development of the invention, the load-carrying mechanism as a wedge-shaped rib belt extends downwards from a load-carrying mechanism fixing point located below the drive pulley within the range of the vertical projection of the drive pulley to a counterweight load-carrying wheel facing the elevator car On the outer circle side, the wedge-shaped rib belt wraps around the counterweight load-bearing wheel and extends from this point to the side of the outer circle of the driving wheel that is opposite to the elevator car, around the driving wheel and stretches downward along the car wall on the counterweight side. The two sides of the elevator car each surround a car carrier wheel arranged below the car at 90° and run upwards along a car wall facing away from the counterweight to a second support means fixing point.

According to a further development of the invention, the elevator car has at least one guide pulley in the region of the wedge-ribbed belt running underneath the elevator car, which is used to guide the wedge-ribbed belt, the guide wheel having ribs and groove.

The proposed solution consists essentially in replacing the flat belt-like carrier with a flat traction surface with a V-belt belt. In the area of its traction surface, a wedge-ribbed belt has a plurality of ribs and grooves running parallel in the longitudinal direction of the belt, the cross-section of which ribs and grooves have side edges which approach each other in a wedge-shaped manner. There are also ribs and grooves on the outer circle of the driving wheel, and the ribs and grooves are complementary to the ribs and grooves on the wedge-shaped rib belt. The wedge shape in this case increases the normal force occurring between the driving pulley and the wedge-ribbed belt, resulting in an improved traction between the driving pulley and the belt.

In addition, the engagement between the ribs and grooves of the wedge-shaped belt and the ribs and grooves on the driving wheel and the roller will ensure good lateral guidance of the load-carrying mechanism distributed on the edges of multiple ribs and grooves.

Of course, the elevator system according to the invention also includes designs with at least two mutually parallel support means strips (rib belts).

According to a preferred configuration of the present invention, the ribs and grooves of the wedge-shaped belt are substantially triangular or trapezoidal. The triangular or trapezoidal ribs and grooves are easy to manufacture and low in manufacturing cost.

A favorable compromise between the requirements for balanced running and traction capacity is that the side edges of the triangular or trapezoidal ribs and grooves have an angle b of between 80° and 100°.

According to a particularly expedient embodiment of the system according to the invention, the angle b between the ribs of the wedge-shaped rib belt and the side edge of the groove is 90°.

Wedge-rib belts that allow particularly small bending radii, ie are suitable for use with driving, reversing and load pulleys with very small diameters, have transverse grooves on their side with ribs and grooves. Therefore, the bending stress generated when running around the driving wheel and the roller can be greatly reduced.

In order to ensure sufficient operational safety of the elevator system, a plurality of individual wedge-rib belts parallel to one another are provided as support means.

The biggest advantage of adopting the elevator system of the present invention is to realize the required torque on the driving wheel and the driving motor thereupon when at least the driving wheel, preferably also including the outer diameter of the reversing wheel and the load-carrying wheel, is 70mm to 100mm Dimensions as well as the dimensions of the entire elevator installation. Experiments to date have shown that different requirements and load limits can be met in an optimal manner with a diameter of 85 mm for the drive and rollers.

Another advantageous further development of the invention consists in that the drive motor with the driving wheel shaft and the driving wheels is mounted on a frame which is supported by a car guide rail and two counterweight guide rails. Therefore, it can be realized that most of the vertical load acting on the driving wheel and the drive motor is transferred to the foundation of the elevator shaft by the guide rails, without loading the shaft wall.

An embodiment of the elevator system according to the invention achieves additional operational safety in that a braking unit is additionally mounted on the frame supporting the drive motor, which brake unit acts on the drive wheel via the drive wheel shaft. The advantage of this arrangement is that, in the event of damage to the motor, the braking effect on the drive wheels is not lost.

An ideal installation situation for a flat belt-shaped load-carrying mechanism can be achieved with the embodiment of the invention, wherein the drive motor with the driving wheel is arranged above the space occupied by the elevator car, wherein the plane of the driving wheel is perpendicular to the car on the counterweight side. The car wall and is arranged approximately in the middle of the depth of the car, and wherein the vertical projection of the driving pulley on the counterweight side of the elevator car is outside the vertical projection of the car, but a part of the vertical projection of the drive motor is in line with the vertical projection of the car Vertical projection overlaps. The setting of this kind of bearing mechanism can realize the application of the wedge-shaped rib belt without twisting the belt of the bearing mechanism. Usually, the driving wheel and the roller plane are set in different directions for the sake of saving space, so this twisting is required .

The shaft space required by the elevator car can be significantly saved by adopting the following method. The bearing mechanism extends downward from the first bearing mechanism fixed point fixed under the driving wheel, surrounds the counterweight bearing wheel, and starts to move from this point to the driving wheel The side of the outer circle that faces away from the elevator car extends around the drive pulley and extends downward along the counterweight-side car wall and then forms the usual underwinding of the car. With such a support arrangement, a spacing between the elevator car and the shaft wall is required on the counterweight side, which is only slightly larger than the diameter of the drive or load pulley. Whereas in the carrier arrangement shown in Figures 5 and 6 of WO 99/43593, which is cited as prior art in this application, the spacing required is at least twice the diameter of the drive wheel.

According to a further embodiment of the elevator system according to the invention, the elevator car has at least one deflection pulley in the region of the wedge-shaped rib belt which runs underneath the elevator car, said guide pulley having ribs and grooves. The above-mentioned beneficial guidance of the load-carrying mechanism can therefore also be realized for wedge-shaped rib belts, which only have ribs and grooves on their running surfaces, because the ribs and grooves are arranged on the car load wheels arranged below the elevator car. The upper radial direction is outward and thus not guided by the latter.

Description of drawings

Embodiments of the present invention will be described below with reference to the accompanying drawings. The figure shows:

Fig. 1 is the sectional view of the elevator system of the present invention parallel to the front end face of the elevator car;

Fig. 2 shows the special embodiment that the carrying mechanism wraps around the elevator car;

Figure 3 shows a tapered belt with triangular ribs and grooves of the present invention, and

Figure 4 shows a ribbed belt with trapezoidal ribs and grooves of the present invention.

Detailed ways

Fig. 1 is a sectional view of the elevator system of the present invention parallel to the front face of the elevator car. Reference numeral 1 designates an elevator shaft, in which a drive motor 2 moves an elevator car 3 up/down via a support mechanism in the form of a ribbed belt 12 . The elevator car 3 is moved by means of car guide shoes 4 on car guide rails 5 fastened to the elevator shaft 1 . The lower sides of the car bottom 6 are provided with car load wheels 7 through which the traction and acceleration force of the wedge rib belt 12 is transmitted to the elevator car 3 . Arranged on the left side of the elevator car 3 is a counterweight 8 which is guided by means of counterweight guide shoes 9 on two counterweight guide rails 10 and suspended by means of a counterweight carrier wheel 11 identical to the elevator car On the same rib belt 12. The drive motor 2 is arranged above the shaft space occupied by the elevator car 3 and has an output shaft 14 acting on a driving wheel shaft 15 parallel to the wall of the elevator car 3 on the counterweight side and facing at least one driving wheel 16 Support. The driving motor 2 and the driving wheel shaft 15 with at least one driving wheel 16 are fixed on a frame 13, which is supported on the car guide rail 5 on the counterweight side and the two counterweight guide rails 10 and is fixed to the guide rails connect.

On the frame 13 that drive motor 2 is supported, a controllable brake unit 17 invisible in the figure is also installed, and said brake unit is arranged on the end of drive wheel shaft 15 opposite to drive motor 2 Within the range and can brake the driving wheel shaft 15 and consequently the driving wheel 16 . The braking unit 17 also plays a role of supporting the end of the driving wheel shaft 15 at the same time. The advantage of this arrangement is that the braking capability of the driving wheels can still be maintained in the event of motor damage.

The plane of the drive pulley 16 is perpendicular to the car wall on the counterweight side and is approximately in the middle of the car depth. The vertical projection of the drive pulley 16 is outside the vertical projection of the elevator car 3 , while a part of the vertical projection of the drive motor 2 overlaps with the vertical projection of the elevator car 3 .

One end of the wedge-shaped rib belt 12 as bearing mechanism is fixed in the range of the vertical projection of the driving wheel below the driving wheel 16 on the frame 13 . Starting from this first bearing mechanism fixed point 18, the wedge-shaped rib belt extends downwards to the side opposite to the outer circle of the counterweight load-carrying wheel 11 and the elevator car 4, and the counterweight load-carrying wheel is encircled. The side of the outer circle that is opposite to the elevator car extends, surrounds the driving wheel and extends downward along the counterweight side car wall, and surrounds a car that is arranged under the car at 90° on both sides of the elevator car The carrying wheels 7 and along the car wall facing away from the counterweight extend upwards to the second fixing point 19 of the carrying mechanism.

The arrangement of said carrying mechanism facilitates the mutual opposite vertical movement of the elevator car 3 and the counterweight 8 , wherein the speed of the elevator car and the counterweight is equal to half the peripheral speed of the driving wheel 16 . When the bearing mechanism is not allowed to twist, that is, when the planes of the driving wheel 16 and the counterweight bearing wheel 11 must be aligned with the plane of the car bearing wheel 7, the special setting of the first bearing mechanism fixing point 18 can realize the counterweight side car The distance between the wall and the shaft wall is as small as possible, which is a practical necessity when using flat support mechanisms.

For the sake of simplicity, this description always refers to an elevator system with a carrier belt, a driving sheave and a counterweight or car carrier sheave, respectively. However, the elevator system according to the invention also includes a design with at least two carrier strips (ribbed belts) arranged parallel to one another, wherein in said design there can likewise be a plurality as a plurality of individual parts juxtaposed to one another or as a combination The driving wheel and the roller of the multiple components together. This multiple set of wedge rib belts is intended for adequate system safety, and is in fact absolutely necessary.

FIG. 2 shows a special embodiment in which the elevator car 3 is encircled from below by means of a V-rib belt 12 . In addition to the above-mentioned car carrier wheels 7, a guide wheel 20 is fastened between the two carrier wheels on the car floor 6, which likewise has ribs and grooves. Such guide wheels are only used for lateral guidance of wedge-shaped ribbed belts 12 with ribs and grooves on the running surface. Since the ribs and grooves are directed radially outward when rotating around the car wheel, such wedge-shaped rib belts cannot be guided laterally by the ribs and grooves when passing the car wheel 7 . However, this guidance is not necessary in every case, for example if the car carrier wheel has a flat ring or is sufficiently long.

Figures 3 and 4 show embodiments 12.1 and 12.2 of the wedge-ribbed belt used in the elevator system according to the invention, with ribs 23 and grooves 24 oriented in the longitudinal direction of the belt.

Preferably, the wedge-ribbed belt 12 has at least the rib and groove layer made of polyurethane.

As shown in FIGS. 3 and 4 , the V-rib belt 12 also has a tensile body in the longitudinal direction, and the tensile body is composed of metal ropes (such as steel wire ropes) or non-metal ropes (such as synthetic fibers/chemical fibers). The tensile body can also be a flat fabric made of metal or synthetic fibers. The tensile body will give the wedge belt 12 the necessary tensile strength and/or longitudinal stiffness.

In the embodiment shown in FIG. 3 the ribs and grooves have a triangular cross-section and in the embodiment shown in FIG. 4 the ribs and grooves have a trapezoidal cross-section. The angle b between the edges of the ribs or grooves will have an influence on the operating characteristics of the ribbed belt, in particular its running evenly and its traction capacity. Experiments have shown that the greater the angle b within certain limits, the better the balanced operation and the worse the traction capacity. When the angle b is between 80° and 100°, the beneficial properties of balanced running and traction capacity can be achieved at the same time. The best compromise between these conflicting requirements is an angle b of approximately 90°.

A further embodiment of the rib belt 12 is shown in FIG. 4 . In addition to the ribs 23 and grooves 24 , the ribbed belt 12 can also have transverse grooves 26 . The transverse grooves 26 will improve the flexural flexibility of the rib belt 12 so that it can cooperate with particularly small diameter drive, load and reversing pulleys.

Claims (12)

1. elevator device that does not have machine room, described elevator device has the drive motor (2) of band driving wheel (16), lift car (3) and be arranged on the counterweight (8) of lift car one side, wherein drive motor (2) drives by the carrying and/or the driver train (12) of driving wheel (16) at least one flat belt shape, described carrying and/or driver train carry and along vertical guide rail (5) moving elevator car around mode with pocket lift car (3), it is characterized in that, the carrying of flat belt shape and/or driver train are v-ribbed belt (12), described belt at least on the sliding surface of driving wheel (16), have a plurality of belt vertically on the muscle (23) and the groove (24) of extends parallel.

2. according to the described elevator device of claim 1, it is characterized in that the cross section of described muscle (23) and groove (24) is triangle or trapezoidal basically.

3. according to the described elevator device of claim 2, it is characterized in that, the side of at least one triangle or trapezoidal the above groove of groove (24) (24) along between angle (b) between 80 ° to 100 °.

4. according to the described elevator device of claim 3, it is characterized in that described angle (b) is 90 °.

5. described elevator device in requiring according to aforesaid right is characterized in that, v-ribbed belt (12) has transverse groove (26) on it has the face of muscle and groove.

6. according to each described elevator device among the claim 1-4, it is characterized in that a plurality of independent v-ribbed belts (12) that be arranged in parallel being arranged as load carrier.

7. according to each described elevator device among the claim 1-4, it is characterized in that the external diameter of driving wheel (16) is 70mm to 100mm.

8. according to each described elevator device among the claim 1-4, it is characterized in that, be respectively arranged with a car guide rail (5) in the both sides of lift car (3) and be provided with two weight guides (10) in the counterweight side of lift car, be installed on the electric machine support (13) with the drive motor (2) with drive sprocket axle (15) and driving wheel (16), described electric machine support is supported by a car guide rail (5) and two weight guides (10) wherein.

9. according to the described elevator device of claim 8, it is characterized in that add upward that at electric machine support (13) brake unit (17) being installed, described brake unit acts on driving wheel (16) by drive sprocket axle (15).

10. according to each described elevator device among the claim 1-4, it is characterized in that, drive motor (2) with driving wheel is arranged on the top in the needed space of lift car (3), wherein the plane of driving wheel (16) is perpendicular to the car walls of counterweight side, roughly be arranged on the centre of car depth, wherein at the vertical projection of the driving wheel (16) of the counterweight side of lift car (3) in the outside of the vertical projection of lift car, but the vertical projection of a part of vertical projection of drive motor (2) and lift car (3) is overlapping.

11. according to the described elevator device of claim 10, it is characterized in that, extend downwardly into counterweight load-supporting wheel (a 11) cylindrical side towards lift car (3) as the load carrier of v-ribbed belt (12) since a load carrier attachment point (18) that is positioned at driving wheel (16) below in the scope of the vertical projection of driving wheel, v-ribbed belt to the counterweight load-supporting wheel around with beginning from then on to the opposing side extension of driving wheel (16) cylindrical and lift car (3), stretch downwards around driving wheel with along the car walls of counterweight side, the car load-supporting wheel (7) the both sides of lift car are arranged on car respectively to below holds with 90 ° and stretches upwards second load carrier attachment point (19) along one with the opposing car walls of counterweight (8).

12. according to the described elevator device of claim 11, it is characterized in that, lift car has at least one guide wheel (20) in the scope of the v-ribbed belt that passes (12) below lift car, described guide wheel is used for v-ribbed belt (12) is led, and described guide wheel has muscle and groove.

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